Question

5 kg visine.....8kg capsuni...136lei
7kg visine.....16kg capsuni...248lei

Va rog sa ma ajutati *Metoda Comparatiei clasa a 4-a*

Problema 2:
12m de stofă..5 m de panza..1060lei
6m stofa.........7 m panza.........260lei

Answer 1

PROBLEMA NR.1
5kg visine+8kg capsuni=136 lei   /x2
7kg visine+16kg capsuni=248 lei
--------------------------------------------
10kg visine+16kg capsuni=272 lei
7kg visine+16kg capsuni=248 lei
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3kg visine     //                  =24 lei
1 kg visine=24:3
1 kg visine=8 lei

5x8+8kgcapsuni=136
40+8c=136
8c=136-40
8c=96
1 kg capsuni=96:8
1 kg capsuni=12 lei

proba: 5x8+8x12=40+96=136 lei

PROBLEMA NR.2
12s+5p=1060 lei
  6s+7p=260 lei  /x2
------------------------
12s+5p=1060
12s+14p=520
-----------------------
//        9p=540
1m panza=540:9
1 m panza=60 lei

12s+5x60=1060
12s+300=1060
12s=1060-300
12s=760
1 m stofa=760:12
1 m stofa=aici da cu virgula. nu stiu cred ca e ceva gresit in problema.